On the southwestern edge of Carmona lie the remains of a Roman city of the dead. A dozen or more family tombs, some elaborate and many-chambered, were hewn into the rock here in the 1st and 2nd centuries AD. Most of the inhabitants were cremated, and in the tombs are wall niches for the boxlike stone urns. You can enter the huge Tumba de Servilia, the tomb of a family of Hispano-Roman VIPs, and climb down into several others.
The site also features an interesting museum displaying objects found in the tombs. Across the street is the 1st-century BC Anfiteatro Romano , though you can't go in.